Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
권호 표지

The Effect of Sr Addition and Holding Time on Mechanical Property and Electrical Conductivity of Al-10.5%Si-2%Cu Secondary Die-casting Alloys

Al-10.5wt%Si-2wt%Cu 다이 캐스팅용 2차 지금의 기계적 특성과 전기전도도에 미치는 Sr 양과 유지시간의 영향 II

  • 신상수 (한국생산기술연구원 친환경청정기술센터) ;
  • 김명용 (한국조폐공사) ;
  • 염길용 (에코 다이캐스트 코리아)
  • Received : 2010.11.14
  • Accepted : 2010.11.24
  • Published : 2010.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

This study evaluates the influence of strontium addition and holding time on mechanical properties for Al-10.5wt%Si-2wt%Cu secondary die-casting alloy and the measured electrical conductivity of modified alloys. A general improvement in the mechanical properties of the alloy was observed after adding the strontium. Ultimate tensile strength, elongation and electrical conductivity of modified alloys were improved by increasing strontium content and holding time. From these results, the optimal strontium content and holding time were identified on the mechanical properties of Al-10.5wt%Si-2wt%Cu secondary die-casting alloys.

Keywords

References

  1. E. J. Vinarcik: "High Integrity Die Casting Processes", John Wiley & Sons, Inc, (2003)
  2. J. R. Davis: ASM Specialty Handbook, "Aluminum and Aluminum Alloys", (1993)
  3. Mollard, F. R., M. C. Flemings, E. F. Niyama : "Understanding Aluminum Fluidity: The Key to Advanced Cast Products", AFS Transactions, 94 (1987) 647-652
  4. I. J. Polmear: "Metals Handbook", ASM, Metals Park, OH, 2 (1979) 164
  5. I. J. Polmear : Light Alloys, "Metallurgy of the light metals", Third edition(1995)
  6. L. F. Mondolfo : "Aluminium alloys Structure and Properties", Butterworth & Co. Ltd., (1976) 370
  7. J. H. Kim, J. W. Choi, J. P. Choi, C. H. Lee, E. P. Yoon: "A study on the variation of solidification contraction of A356 aluminum alloy with Sr addition", Journal of materials science letters, 19 (2000) 1395-1398 https://doi.org/10.1023/A:1006773704321
  8. B. Closset, J. E. Gruzleski: "Mechanical Properties of A356.0 Alloys Modified with Pure Stronitum", AFS Trans, 90 (1982) 453-464
  9. P. D. Hess, E. V. Blackman: "Strontium as a modifying Agent for Hypoeutectic Aluminium-Silicon Alloys", AFS Transaction, 83 (1975) 87-90
  10. B. Closset, J. E. Gruzleski: "A study of the use of Pure metallic Strontium in the Modification of Al-Si Casting Alloys", AFS Transaction, 89 (1981)
  11. Shu Zu Lu, A. Hellawell: "The Mechanism of Silicon Modification in Al-Si Alloys: Impurity Induced Twinning", Metall. Trans. A, 18A (1987) 1721-1733
  12. S. S. Shin, M. Y. Kim and G. Y. Y : "The Effect of Sr Addition and Holding Time on Microstructure of Al-10.5%Si-2%Cu Secondary Die-casting Alloys, J. Kor. Foundrymen's Soc, 30(5) (2010) 42-47
  13. M. H. Mulazimoglu, R. A. L. Drew and J. E. Gruzleski: "The electrical Conductivity of cast Al-Si alloy in the Range 2 to 12.6wt. pct. Silicon", Metallurgical transaction, 20A (1989) 383-89
  14. M. H. Mulazimoglu, R. A. L. Drew and J. E. Gruzleski: "Electrical conductivity of Aluminum-rich Al-Si-Mg alloys", J. Of Mat. Science Letter, 8(3) (1989) 297-300 https://doi.org/10.1007/BF00725503
  15. H.Oger, B.Closset and J. E. Gruzleski: "Characterization of the eutectic microstructure in Al-Si foundry alloys by electrical resistivity", AFS Trans., 91 (1983) 17-20
  16. J. E. Gruzleski and B. M. Closset: "The Treatment of Liquid Aluminum-Silicon Alloys", AFS, Illinois (1990)
  17. M. Drouzy, S. Jacob and M. Richard: "Interpretation of tensile results by means of quality index and probable yield strength", AFS Int. Cast Metals, (1980) 43-50